Work holder



H. H. HOFFMAN.

WORK HOLDER. APPLICATION FILED JUNE 6,1921.

1,403,781; Patented Jan. 17, 1922.

mnnmw 'eg H H HUFFMAN UNETED STATES PATENT OFFICE.

HARRY H. HOFFMAN, OF BALTIIHDRE, MIARYLAND.

WORK HOLDER.

Application filed June 6, 1921.

To all ZU/lO/J'b it may concern:

Be it known that I, HARRY H. HOFFMAN, a citizen of the United States, residing at 030 Hickory AveL, city of Baltimore, and State of hlaryland, have invented certain new and useful Improvements in Work Holders, of which the following is a specification.

This invention relates to work holders, and especially to an improved handling device for faucets or spigots while bufling or otherw'se operating on the spigots.

The main object of the invention is to provide a thoroughly practical, very etlicient and comparatively inexpensive device to which the spigo'ts can be very quickly attached, which holds the spigots in such manner that nearly every part of its exterior surface is accessible to the buffing wheel, and which, by a quick change of engagement with the spigot, enables the remaining part to be conveniently and safely held against the bufing wheel.

A further object of the invention is to provide a work holder of this character which has interchangeable parts for fitting the chambers of different sized spigots, and other interchangeable parts for fitting spigot-shanks of different lengths.

A further object is to provide, in a device of this character, a simple and effective means to prevent rotation of the valve-handle while it is being buffed.

(it-her objects and advantages will be pointed out or implied in the following details of description, in connection with the accompanying drawings in which,

Fig. 1 is a side elevation of my improved work holder,

Fig. 2 is an edge view, .or elevation at right angles to ig. 1,

Fig. 3 is a view similar to Fig. l, but showing a spigot held by the work holder,

Fig. el is a sectional view showing the internal threads for securing the interchangeable mandrcls in place, and

Fig. 5 is a view illustrating several forms of inte changeable mandrels.

Referring to these drawings in detail, in which similar reference characters correspond to similar parts throughout the several views, and in which a faucet or spigot of ordinary construction is shown at s, to illustrate the application of the work holder, the invention consists in the construction Specification of Letters Patent.

Patented Jan. 1'7, 1922.

Serial No. 475,494.

and arrangement of elements which will now be fully described as follows:

A substantially cylindrical handle 1 is preferably spherical at its ends, as shown at 2, so that it can be conveniently rotated about its cylinder-axis for turning the spigot while holding it against the butling wheel. This handle is formed integrally or in one piece with a laterally extending arm 3 which has one side flush with one end of the handle. This arm includes a bifurcated free end portion i that is substantially parallel with and spaced from an axial extension of the handle, which constitutes a mandrel for extending into the chamber or passage in the attaching end of the faucet or spigot to be operated upon. For convenience in fitting this device to faucets of different sizes, and having passages of different diameters, I may provide a number of interchangeable mandrels 5, 5, 5 and probably others; these mandrels having threaded shanks of a uniform size and threading, so that they can be fitted alternatively into the threaded bore 6 of the handle 1. Instead of threading the interchangeable mandrels into the handle 1, I may secure them in the handle by frictional engagement or by other appropriate means; or, as a simple form of the device, I may form any one of them integrally with the handle. At the oppo site end of the handle is a supplemental. mandrel 7 which may be of any appropriate diameter and shape, or may be interchange able with the mandrels 5. 5, 5 etc, or formed integrally with the handle.

The furcations 8 of the arm t are spaced just enough to permit the easy entrance of the valveshank of the spigot, as shown, and a pin or stud 9 extends laterally from the arm or bifurcated extension at a position in which it abuts against the valve-handle of the spigot to prevent turning of the handle while it is being buffed. This stud or abutment 9 is especially useful in preventing wheellike handles from turning, as it extends between the spokes of the wheel or handle and limits the rotation in either direction. These studs may be removable, as indicated in Fig. 4, or they may be formed integrally with the arm 4.

In order that this work holder may be interchanged to hold long-shank spigots as well as the short-shank spigot here shown, I may provide a bifurcated extension or attaohment 10 with a shank 11 of a size to snugly fit between the furcations 8, and I may secure this attachment in place by any appropriate means, for instance, a taper-pin 12 to fit in registering apertures 13 and 1 1 of the two bifurcated elements. hen the element 10 is attached to the element apt-he furcations 8f engage with the valve-shank of the long-shank spigot while the adjacent mandrel is inserted in the chamber of the long attaching shank of the spigot.

- lVhile this work holder can be used in differentways, the following will probably be preferable: The valve of the spigot is first tightened to hold the valve-handle against turning while it is being buffed on the side that will be next to the stud 9, and while the valve stem and upper rear part of the spigot is being bufied. After this much of the bufiing is completed, the heat of friction is ished or buffed parts with the naked hand, and ordinarly, the spigots are left to cool while 'others are being similarly partly bufied'; but by use of this holder, the bufling 5 can be completed without laying the spigot aside to cool, and it is now placed in the holder as shown, and the unpolished or unbuifedparts are accessible by the bufiing wheel while the handle 1 protects the hands of the operator from the heat-of-friction while providlng a positive means of supporting and quickly and evenly turning the spigot while holding it against the buffing wheel. It should be understood that the mandrel 7 is for inserting in the chamber of the spigot while the parts are being buffed which are rendered inaccessible to the bufling wheel by the bifurcated arm 4 or its attachment 10.

The mandrels are preferably slabbed or planed at 15 for engagement with a wrench for loosening and tightening them in the handle 1. 7

It is not intended to limit this invention to the exact details of construction and arrangement shown, but changes may be made within the scope of the inventive ideas as described and claimed. What I claim as my invention is:

1. In a work holder, the combination of a substantially cylindrical handle, a mandrel extending in axial alinement with said handle, and an arm formed integrally with said handle and extending laterally from one end of the handle, said arm including a bifurcated extension that is spaced from and substantially parallel with said mandrel, the space between the furcations of said arm being in position to receive the valve-shank of a spigot when said mandrel is inserted in the hollow shank of the spigot.

2. The structure defined by claim 1, said bifurcated extension being provided with an abutment to engage the valve-handle of the spigot and prevent rotation'of the handle.

3. The structure defined by. claim 1, an 7 auxiliary bifurcated extension of the first said bifurcated extension being provided and having a shank adapted to fit snugly between the furcations of the first said extension, and means to removably secure said shank to said furcations.

e. The structure defined by claim 1, and a mandrel extending axially from the other end of the handle.

5.-The structure defined by claim 1, said mandrel being interchangeable with other mandrels, for'the purpose specified.

In testimony whereof I afiix my signature.

HARRY H. HOFFMAN. 

